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Can a Small Group of Passive Agents Cause Lasting Chaos? hydrodynamic limit and phase separation of an active-passive mixture

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SSDW06 - Stochastic Systems in Active Matter

In this talk, I will discuss a model mixture of active (self-propelled) and passive (diffusive) particles with non-reciprocal effective interactions (or forces that violate Newton’s third law). We derive the hydrodynamic PDE limit for the particle densities, which is not a Wasserstein gradient flow of any free energy, consistent with the microscopic model having non-equilibrium steady states. We study the emergence of collective behaviour, which includes phase separation and dynamical (travelling) steady states.

This talk is part of the Isaac Newton Institute Seminar Series series.

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